Polish Foreign Minister Radoslaw Sikorski’s candidacy for EU foreign chief has Polish President Bronislaw Komorowski's support, Komorowski told the public radio on Friday adding that the function could influence the EU stance towards the Russia-Ukraine conflict.

"It does matter to us who will serve the function of European foreign policy chief - whether they will support stronger and independent Ukraine and its territorial integrity or whether they will listen to all kinds of fears, suggestions related to special treatment of Russia's interests," President Komorowski told Polish Radio Three.

Asked whether Sikorski could count on the president's support in his run for the EU foreign policy chair, Komorowski said: "Absolutely yes. Full support."

Sikorski is officially a candidate to become the next EU High Representative for Foreign Affairs and Security Policy, as well as Vice-President of the European Commission, Polish government official Pawel Gras said on Thursday.

At the last EU summit earlier this month EU leaders failed to reach agreement on a candidate for the foreign affairs chair. The strongest runner, Italian Foreign Minister Federica Mogherini, was protested by the central-European countries owing to her conciliatory stance towards Russia. On the other hand, EU leaders voiced their reservations at Sikorski’s tough stance against Moscow.

" For PiS [the Polish right wing opposition Law and Justice] Sikorski is too soft on Russia and according to EU to politicians he is too hard, Polish Prime Minister Donald Tusk said on Twitter. “Everyone thinks he’s competent, though. So that means he’s just right," he added.